Update CHANGELOG.md

Author: uphlewis

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 All notable changes to the package will be documented in this file.
 
+## [v1.2](https://github.com/upmind-automation/webhook-endpoint/releases/tag/v1.2) - 2023-08-10
+
+- Add object, brand and user id getters to WebhookEvent
+- Add tests for WebhookEvent getters
+
 ## [v1.1](https://github.com/upmind-automation/webhook-endpoint/releases/tag/v1.1) - 2023-08-10
 
 - Add WebhookException::getHttpCode() to get an appropriate HTTP response status code